Speed Glue is a glue that is used to re-fix the rubber surfaces to the racket or paddle. Speed glue is usually applied around 30 minutes before a match starts. The use of speed glue has been found to increase the elasticity of the racket, which adds speed and spin to the ball.
Water Based Glue
The only glue that is authorized for official tournaments is water based glue. These glues don't contain any harmful chemicals and are used by professional table tennis players.